高效凝胶色谱研究丁苯橡胶改性沥青的热老化性能

A Study of Thermal Ageing Properties of SBR Modified Bitumen by High Performance Gel Permeation Chromatography

丁苯橡胶与胜利100号沥青混炼后的改性沥青。具有耐热老化的性能,适合于高等级公路用的改性沥青。W.A.达克研究了沥青分子量分布与其物性指标的关联。丁苯橡胶改性沥青的热老化前后性能的研究尚未见报道。

The molecular weight distribution of SBR-mo-clified bitumen was determined by high performance gel permeation chromatography with UV-de-tector at 204 nm before and after thermal ageing The molecular weight distribution moved toward macromolecule after thermal ageing.The correlation of the molecular v/eight distribution with the physical porperties and the conditions for forming SBR-modified bitumen are discussed.